Income Taxes (as restated) - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 52.6	$ 38.4	$ 22.0
Additions for the current year tax positions	13.2	10.2	11.6
Additions for prior year tax positions	8.1	5.5	9.6
Reductions for prior year tax positions	(1.5)	(1.0)	(4.8)
Reductions for settlements with tax authorities	0.0	0.0	0.0
Reductions for expirations of statute of limitations	(2.4)	(0.5)	0.0
Ending balance	$ 70.0	$ 52.6	$ 38.4